I purchased the 16 size brush. If you are considering these brushes for calligraphy of anything else that requires a brush with a responsively flexible head, then look elsewhere.

If you can stick to using just the very tip of the hairs (the top 3rd) it works ok for a while, but as soon as the head becomes saturated it refuses to rebound straight again. Without manual intervention and giving it some time to dry, the hairs stay pushed over in the direction you dragged them from and the brush becomes useless til dry again.

The only real advantage to this brush is the price, though you definitely get what you pay for in this case.